CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
70.0%
Issue Overview:
It was reported (http://bugs.python.org/issue21529) that Python built-in _json module have a flaw (insufficient bounds checking), which allows a local user to read current process’ arbitrary memory.
Quoting the upstream bug report:
The sole prerequisites of this attack are that the attacker is able to control or influence the two parameters of the default scanstring function: the string to be decoded and the index.
The bug is caused by allowing the user to supply a negative index value. The index value is then used directly as an index to an array in the C code; internally the address of the array and its index are added to each other in order to yield the address of the value that is desired. However, by supplying a negative index value and adding this to the address of the array, the processor’s register value wraps around and the calculated value will point to a position in memory which isn’t within the bounds of the supplied string, causing the function to access other parts of the process memory.
Affected Packages:
python-simplejson
Issue Correction:
Run yum update python-simplejson to update your system.
New Packages:
i686:
python-simplejson-debuginfo-3.5.3-1.7.amzn1.i686
python-simplejson-3.5.3-1.7.amzn1.i686
src:
python-simplejson-3.5.3-1.7.amzn1.src
x86_64:
python-simplejson-debuginfo-3.5.3-1.7.amzn1.x86_64
python-simplejson-3.5.3-1.7.amzn1.x86_64
Red Hat: CVE-2014-4616
Mitre: CVE-2014-4616
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 1 | i686 | python-simplejson-debuginfo | < 3.5.3-1.7.amzn1 | python-simplejson-debuginfo-3.5.3-1.7.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | python-simplejson | < 3.5.3-1.7.amzn1 | python-simplejson-3.5.3-1.7.amzn1.i686.rpm |
Amazon Linux | 1 | x86_64 | python-simplejson-debuginfo | < 3.5.3-1.7.amzn1 | python-simplejson-debuginfo-3.5.3-1.7.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | python-simplejson | < 3.5.3-1.7.amzn1 | python-simplejson-3.5.3-1.7.amzn1.x86_64.rpm |
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
70.0%